Aeration tube



FIG. 1 is a perspective view of an aeration tube showing our new design;

FIG. 2 is a front elevational view; the rear elevational view is a mirror image of the front view;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a right side elevational view thereof.

The broken line showing is included for the purpose of illustrating portions of the article and boundaries of the claimed subject matter and forms no part of the claimed design. 

CLAIM The ornamental design for an aeration tube, as shown and described. 